Giannitsa Lake (Greek: Λίμνη Γιαννιτσών), also known as Loudias Lake (Greek: Λίμνη Λουδία) is a former post-glacial lake in Central Macedonia, Greece, south of the town of Giannitsa and north of Gidas (later renamed Alexandreia). It or the surrounding marshland were sometimes called Borboros 'slime' or Borboros Limen.^[1] Shallow, swampy, and variable-sized, it was drained from 1928 to 1932 and became agricultural land.

Quick Facts Location, Coordinates ...

Giannitsa Lake
Loudias Lake
Map depicting the Battle of Giannitsa around the lake.
Giannitsa Lake Show map of Greece Giannitsa Lake Show map of North Macedonia
Location	Macedonia (Greece)
Coordinates	40°41′17″N 22°23′20″E
Type	Post-glacial lake
Etymology	Named after the town of Giannitsa.
Primary inflows	Loudias River
Primary outflows	Loudias River
Surface area	c. 40.5 km2 (15.6 sq mi)
Settlements	Giannitsa

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It was fed by the Loudias River and the plain of Roumlouki stretched to its south.

In Bulgarian the lake was called Enidzhevardarsko Lake (Ениджева̀рдарското езеро) or Pazarsko Swamp (Пазарското блато).

The Lake played a major role in the Macedonian Struggle between the Greeks and Bulgarians, as it provided hiding places for the armed bands of both sides. The conflict for control of the Lake is the central historical event of Penelope Delta's 1937 novel The Secrets of the Swamp.

The lake was drained in 1928-1932 by the New York Foundation Company.^[2]

• Greek revolutionaries Tellos Agras and Ioannis Demestichas at Giannitsa Lake c. 1906
• Bulgarian revolutionary Apostol Petkov at Giannitsa Lake c. 1906